To put one or more applications into the iPhone app store costs USD 99
annually. While it is true that Apple needs to approve applications I
cannot imagine any serious security review for this kind of money.
They can, of course, pull any program at any time ... and they have your
name and signature on a contract that probably allows them to easily hold
you liable for any kind of mischief.
So Apple perhaps has more leverage in the legal domain, but truly
malignant behaviour would be illegal anyway, and Google can probably tell
the cops in which cafe to pick you up during your lunch break.